Anghel Review of ...
Published by Stewart Shipard, Owner Manager at SLS Technology Pty Ltd - a Water Industry company
Anghel
Review of the coagulant dosing Aluminium, Ferric or Calcium or magnesium or combination of them should be the first line of thought. Chlorine application is typically not the answer as it can be more detrimental to the good bugs and inefficient at the pH of the process. And of cause your polymer supplier has not tweaked their product formula a lot recently!!!
You may need to investigate adjusting the sludge residence time and the return/recycling rates if a solution is not otained.
without specifically knowing the WWTP its hard to be more specific but from my experience WWTP operation who have had biological pain have nearly always benefited significantly from an independent audit by an experienced bio reactor consultant.
1 Comment
Dear Stewart,
I deem too they have to better investigate the causes of the MP foaming.
The use of "additives" to quickly address a well known biological issue seems to me a temporary, expensive fix requiring then the disposal of live MP by means of separate lines to avoid short circuits.
We still use Sodium hypo on RAS whenever MP and nocardia are: in our textile CMAS only hypo could quickly get rid of those "bad bugs" at reasonable price, providing fast process recovery.
Sure, dosage should be exactly tested to avoid "slaughter of the innocents". For reference http://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwji-troidfXAhVSKFAKHflnCYAQFghEMAI&url=http%3A%2F%2Fwww.newea.org%2Fwp-content%2Fuploads%2F2015%2F05%2FAC15_Session21_PDombrowksi.pdf&usg=AOvVaw37AKZWNCq85zbvfyH5tuM8
Published by Ing.Tiziano Zampollo, Employee at Water Engineers & Consultants - WEnCo